<template>
  <div class="welcome">
    <div class="context">
      <h1>欢迎使用慧慧返利后台管理系统</h1>
    </div>
    <div class="area">
      <ul class="circles">
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
      </ul>
    </div>
  </div>
</template>

<script>
export default {
  name: 'Home',
  data () {
    return {}
  },
  mounted () {
  },
  computed: {},
  methods: {}
}
</script>

<style scoped>
  .welcome {
    width: 100%;
    height: 100%;
  }

  .welcome .context {
    width: calc(100% - 200px);
    position: absolute;
    text-align: center;
    top: 20%;
  }

  .welcome .context h1 {
    text-align: center;
    color: #4e54c8;
    font-size: 50px;
  }

  .welcome .area {
    background: #fff;
    width: 100%;
    height: 100%;
  }

  .welcome .circles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
  }

  .welcome ul {
    margin: 0px;
    padding: 0px;
  }

  .welcome ul.circles li {
    position: absolute;
    display: block;
    list-style: none;
    width: 20px;
    height: 20px;
    background: #4e54c8;
    animation: animate 25s linear infinite;
    bottom: -150px;
    opacity: 50%;
  }

  .welcome ul.circles li:nth-child(1) {
    left: 25%;
    width: 80px;
    height: 80px;
    animation-delay: 0s;
  }

  .welcome ul.circles li:nth-child(2) {
    left: 10%;
    width: 20px;
    height: 20px;
    animation-delay: 2s;
    animation-duration: 12s;
  }

  .welcome ul.circles li:nth-child(3) {
    left: 70%;
    width: 20px;
    height: 20px;
    animation-delay: 4s;
  }

  .welcome ul.circles li:nth-child(4) {
    left: 40%;
    width: 60px;
    height: 60px;
    animation-delay: 0s;
    animation-duration: 18s;
  }

  .welcome ul.circles li:nth-child(5) {
    left: 65%;
    width: 20px;
    height: 20px;
    animation-delay: 0s;
  }

  .welcome ul.circles li:nth-child(6) {
    left: 75%;
    width: 110px;
    height: 110px;
    animation-delay: 3s;
  }

  .welcome ul.circles li:nth-child(7) {
    left: 35%;
    width: 150px;
    height: 150px;
    animation-delay: 7s;
  }

  .welcome ul.circles li:nth-child(8) {
    left: 50%;
    width: 25px;
    height: 25px;
    animation-delay: 15s;
    animation-duration: 45s;
  }

  .welcome ul.circles li:nth-child(9) {
    left: 20%;
    width: 15px;
    height: 15px;
    animation-delay: 2s;
    animation-duration: 35s;
  }

  .welcome ul.circles li:nth-child(10) {
    left: 85%;
    width: 150px;
    height: 150px;
    animation-delay: 0s;
    animation-duration: 11s;
  }

  @keyframes animate {
    0% {
      transform: translateY(0) rotate(0deg);
      opacity: 1;
      border-radius: 100%;
    }
    100% {
      transform: translateY(-1000px) rotate(720deg);
      opacity: 0;
      border-radius: 100%;
    }
  }
</style>
